1.We are professional bearing manufacture and trade company. 2.Bearing materials: Chrome steel/GCr15 3.P4.P5.P6.P0 ... are also agent for ZWZ and etc.We can supply the following bearing:Deep groove ball bearing:Model:606 607 608 609 ... K30, K3500, P30, 3800, 3900 series, Suburban, Pick-up, Van), Truck 1/2 Ton L15, M15, S-15, 100, 1000, 1500, ... stock.Just feel free to contact me. Truck Bearing high quality